Support lug for domes



P 29, 1931- w. M. GOLDSMITH 1,824,816

SUPPORT LUG FOR DOMES Filed March 24, 1927 grwenfo'o Patented Sept. 29, 1931 warren STATES PATENT OFFICE.

ILLIAM M. GOLDSMITH, orcrnomim'rr, onro, AssIGNon TO THE GOLDSMITH ivrE'rAL LATE COMPANY, or s CINCINNATI, onro, A CORPORATION or OHIO "surrorvr rue ron DOMES Application filed March 24, 1927. Serial No. 177,923.' I

This invention relates to removable forms or domes for use in concrete Ifloor and beam construction, andmcans for positioning the domes preparatory to the pouring of. plass tic concrete thereon for. forming the floor I and beams.

An object of the invention is to provide a dome and dome supporting. means, allof which may be easily removed after the said plastic concrete has setthereabout.

Another object is to provide means whereby to preclude collapse or spreading of the domes due to the weight and lateral force of plastic concrete thereon. 1 r

Another object is to provide means for the purposes stated which is simple ofconstrue tion and operation and which may be cheaply manufactured.

These and other objects are attained by EIQ the means described herein and disclosed in the accompanying drawings, in which:

Fig. 1 is a cross sectional view showing the device of the invention and its co-operative relationship with a temporary supporting structure.

Fig. 2 is an enlarged detailed cross sectional view of the device shown in Fig. l.

ig. 3 is a view on line 33 of Fig. 2.

In the construction of concrete floors and supporting beams therefor, it is desirable to so construct the temporary supporting structure comprising domes or forms and the supporting false work, that the alignment and shape thereof will not be affected 1 by the action of plastic concrete poured thereon. There is a tendency of the plastic concrete forming beam 6, to exert lateral force upon the side walls 7 and 8 of domes or forms 9, which force may ordinarily collapse said walls to some extent and cause a general distorted condition of the joist.

There is also a tendency, when sufiicient concrete is poured to cover the dome for form'- ing floor 10, for the weight of concrete on 1 top of said dome to spread the side walls 7 and 8, which would likewise result in a distorted condition of the joist. The means described herein will prevent such distortion and at the same time effect a considerable "1 saving in time and labor, due to the simplicity thereof and the ease with which the various parts may be removed and re-used.

The device comprises a lug 11 having pro-.

vided therein a longitudinal threaded'bore .12 for receiving the threadedshankl3 of a suitable screw 14 which is provided with an abutting flange 15 and an integral handle portion 16 for turning the screw. The W2Lll8 of dome 9 is clamped between the flange 15 and an abutting face 17 of lug 11, for retaining the lug in an extended position upon the outer face 18 of wall 8 of the dome. V

The dome may have a plurality of'spaced perforations 20in'the side walls thereof for receivingscrews 141. It is readily evident that by using the perforations nearer the top of the dome, the dome will be lowered and shallow. beams or joist 6 may be formed, whereas if the lowermost perforations are utilized, a deepbeam may be formed if desired; In. order to preclude displacement of the .domes relative to the supporting structure 2l a perforation 22 is provided in the lug, through which nails 23 may be driven into the structure 21. To facilitate removal of lugs 11 from the set concrete the tops of the lugs are rounded as at 24 and if necessary'may be machined to a smooth surface upon which plastic concrete would not easily adhere. i

t The manner of preparing the structure for use is as follows: The supporting structure 21' comprising shoring 25 and soflits 26 is first erectedand aligned. A dome 9 is then provided with anumber of the extending lugs 11 secured thereon byscrews 14 through the proper perforations 20 for forming a beam of any desired depth- The dome is then positioned'with lugs ll restingupon soflits 26 as shown in Fig. 1, whereupon nails 23 are inserted in perforations 22 and driven into soffits 26 for" precluding relative movement thereof. Plastic. concrete indicatedby 27 may then be poured as shown in Fig. 1.

After the concrete has set, it is desired to remove the entire false work includingthe domes and lugs 11. First the screws 14 are unscrewed and removed 'fromthe' bore-in lugs ll'whereupon domes 9 may be removed by withdrawing them downwardly between the shores 25. The temporary supporting structure 21 comprising shores 25 and soflits 26 may then be removed exposing lugs 11 which may then be easily severed from the concrete beams. If nails.23 are of sufficient length, the lugs may be removed together with the supporting structure.

It should be noted that the particular arrangement'of the lugsgand domes and the securing ofthe lugs to the soiii-ts by means of nails 23 precludes anymovement of they domes relative to the supporting structure. The facility with which the domes may be thus supported, aligned and removed per-' mits of their erection and removal by unskilled workmen. Itis'also obvious that the various parts used .in the herein described structure may be manufactured at a minimum of expense.

.On some occasions it may be desiredto remove the forms or domes 9, leaving the shoring-in position for supporting the semidried concrete floor until the concrete has set sufliciently to support itself. v

The removal of the thumb screws .14 permits such action. The domes may therefore be used with other blocks or lugs 11, while the lugs .11 embedded in the drying concrete remain there .until it is safe toremove the shoring, whereupon the lugs may removedaind reused.

hat is claimed is:

1. A supporting device for forms having perforate side walls and a top, comprising a lug having a threaded bore and adapted to extend outwardly from one offthelside walls for suspending the form from a soliit, a screw threaded means adapted to extend through one of the perforations in the side wall and to be received in the threaded lug for securing the lug upon the wall at predetermined distances from the top of the form whereby to form beams of various dimensions, and means for securing the lug to a sofiit for precluding relative movement of the form and sofiit when plastic concrete is applied thereon.

2. In the construction of concrete floors and beams therefor, .the combination with a temporary supporting structure comprising soflits, of a form comprising perforate side walls, screw threaded means adapted for insertion through. the perforations in the side walls, co-operative lugs having threaded bores for receiving the screw threaded means whereby to secure the lugs upon the side walls, the lugs projecting outwardly therefrom and abutting the soilits for suspending the forms therefrom and means precluding relative movement'of the form .and soflit-s when plastic concrete is be readily pour-ed thereon.

8. A- dome supporting device for use with a dome having a perforate side wall, comprising an apertured lug, said aperture having a threaded wall,rand a screw having a threaded shank for projection through a perforation in the dome and receivable in the threaded aperture in the lug, the screw having a shoulder for abutting a dome wall whereby the lug may be drawn tight against the dome.-

p 4. A support member for tiles having a perforate wall, comprising a lug having a recess therein, a locking member comprisinga shoulder for contacting the tile and a shank adapted to be projected through a perforation in the tile and to enter into the recess in the lug, and complementary means on the shank and within the recess for clamping the .lug upon one side of a tile and'the shoulder upon the opposite side of atile.v

A support member for tiles having a perforate wall, comprising a lug, a locking member comprising a shoulder for contact ing the tile,'and a shank adapted to be projected through a perforation "in a tile and to detachably engage the lug for clamping the ing on one side of a tile and the shoulder upon the other side of a tile.

In testimony whereof, I have hereunto subscribed my name this 19th day of March,

WILLIAM M. GOLDSMITH. 

